Die-lapping machine



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' DIE LAPPING- MACHINE Filed April 27, 1927 5 :1 l v v 5 I I 2 l 7 a 12 17 J IN VEN TOR. I

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1L9 ATTORNEY proved machine and Fig.

tween'the wire anddie inner wall, through- 'into conical form. Also ifthe I the die is not round it must be made so.

Patented May 27, 1 930 PATENT ori-lcr.

.WILLIAM HADDOW, OF OSSINI'NG, NEW YORK DIE-LAPPING MACHINE Application filed April 27,

This invention relates to die lapping machines and has for its object to provide a machine of the character specified, simple in construction, eflicient in operation and easily adjustable for various requirements.

To these ends and others which will appear later herein, my improvements comprise features illustrated in their preferred embodiment in the drawing accompanying this specification,

Wherein Figure 1 is a plan view of my im- 2 is a front elevation corresponding therewith. Fig. is a .detail elevation, partly in section, of the die carrier and Fig. 4 is a sectional elevation of the die in its holder. Figs. 1 and 2 are to the same scale. Fig. 3 is about twice the scale and Fig. 4 about four times the scale of Figs. 1 and 2. I

My improved machine is of great simplicity and may beconstructed with economy from simple elements, the whole being mounted on a plate or base 2.

The present machine is directed particularly to the preparation of diamond dies such as are commonl used for drawing fine wire. These dies are urnished in the market with holes therethrough but for use must be cut or lapped to a given size and the opposite openings of the hole therethrou h flared out ole through The diamond die 3 is conveniently'mounted in a small ring 4 which in turn is removably fixed in holder 5 of pulley 6 so as to centralize the hole through the die in said pulley. Said pulley preferably mounted on a ball-bearing 7 supported on arm 8, mounted for various ad- I justments in post 9 upstanding from base 2.

Lapping wire 10 passes through the opening in the .die and is secured at either end in opposite arms" l1, 12 of C shaped frame 13. By reference to Fig. 4 it will be seen that w re 10, where it passes through the mid-portion of the die, completely fills that mid-portion, diametrally. This feature insures contact be out a maximum portion of the circumference of the hole in the die.

which is rotated at high speed is,

1927. Serial No. 187,033.

Arm 8 may be adjusted toward and from wire 10 by sliding said arm in block 14 where it may be secured by set screw 15. Also by rotating arm 8 slightly in said block the die may be tipped one way or the other rclativel to wire 10. By shifting the shank of bloc 14 up or down in post 9 the die may be raised or lowered as desired. One end of wire 10 is: secured by some convenient means, such as screw 16, to one of the frame arms, as 11, and the other similarly secured to rod 17 mounted to slide in line with said wire'in the other arm 12 of said frame 13. The wire may be'maintained under tension by spring 18 about the upper end of rod 17 and the tension may be adjusted by nut 19 threaded on rod 17. C shaped frame 13 is carried by and adj ustably fixed 1 set screw 20 in one end of lever 21 pivotec at 22 in post 23 upstanding from base 2.

Adjacent post 23 is stand 24 from the upper end of which projects horizontally shaft 25 'on which freely turns pulley 26. To said pulley is fixed cam 27 which engages the under face of the rear end of lever 21 and said cam is efficient for rocking said lever and frame 13.

Pulleys tated by from some known source of power not shown. Lever 21 is held to engagement with cam 27 by pull spring 30. 1

The peculiar mounting of frame 13 im-. parts to wire 10, not only an up and down movement through die 3 but also a swinging movement whereby either mouth of the hole in the die is given a conical form. Also by shifting frame 13 up or down in lever 21 the character of the opposite openings in the die may be changed. As frame 3 is shown set in Fig. 2, wire 10 will produce a wider flare in the upper mouth of the die than in: its lower mouth. This feature of adjustment is of high combination of a pivoted lever, a frame adjustably fixed in oneendof said lever, a lap- 6 and 26 may be conveniently romeans of belts 28, 29 respectively" 1. In a device of the character described the I ping wire sustained in said frame and automatic means for oscillating said lever.

2. In a device of the character described the combination of a pivoted lever, a frame, having to outreaching arms, adjustably fixed in one end of said lever, a la ping Wire sustained between the arms of said frame and automatic means for oscillating said lever.

3. In a device of the character described the combination of a pivoted lever, a frame, having two outreachin arms, adjustably fixed in one end of said ever, said arms having means for sustaining a lapping wire therebetween, a die carrier revolubly supported with its axis approximately in line with the wire sustaining means of said arms, means for oscillating said lever and means for rotating said die carrier.

4. In a device of the character described the combination of a pivoted lever, a frame, having two outreaching arms, adjustably fixed in one end of said lever, said arms having means for sustaining a lapping wire therebetween, a die carrier revolubly supported with its axis approximately in line with the wire sustaining means of said arms, means for oscillating said lever, means for rotating said die carrier, means for adjusting said die carrier relativel to said frame and means for adjusting said fiame up and down relatively to said lever.

I 5. In a device of the character described the combination of a pivoted lever, a frame, .having two outreaching arms, adjustably fixed in one end of said lever, a' lapping wlre sustained between the arms of said frame, automatic means for oscillating said lever and means for adjusting said frame up and down relatively to said lever.

In witness whereof, I hereby afiix my signature this 26th da of April, 1927.

VI ILLIAM HADDOW. 

